Steam-trap



(No Model.)

W. E. HALL.

STEAM IRAP. No. 432,269. Patented July 15, 1890.

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UNITED STATES PATENT OFFICE.

WILLIS E. I'IALL, OF ALTOONA, PENNSYLVANIA.

sTEAlvlj-TRAP.

SPECIFICATION forming part 'of LettersPatent No. 432,269,`dated July 15, 1890.

Application filed May22, 1890. Serial No. 352,770. (No model.)Y

To all whom it may concern:

Be` it known that I, 'WILLIS E. HALL, of Altoona, county of Blair, State of Pennsylvania, have invented a certain new and useful Improvement inSSteam-Traps, of which the following is a true and accurate description, reference being` had to the accompany'- ing drawings, which form apart of this specification.

My invention relates to steam-traps, and has for its obj ect to provide a new steam-trap which will be sensitive in its operation, while at the same time it is simple and durable in its construction.

The nature of my invention will be best understood as described in connection with the drawings'and the novel features which I desire to protect by Letters Patent are hereinafter clearly stated in the claims.

In the drawings, Figure 1 is a central longi-.

tudinal section through my steam-trap, and Fig. 2 a cross-section on the line X X of Fig. 1.

A is the casing of the steam-trap, provided with an entrance-passage a. and an outletpassage a2, a valve-seat a being formed in the outlet-passage. The top of the casing is op'n and internally threaded, as shown at a3.

vB is the lid or cover of the casing, externally threaded, as shown at b, so as to screw into the top of the casing, and formed with a passage h through it.

C is a stuiiing-box screwing into the top of the lid or cover B.

E is an elastic or expansible box, the top andbottom of which are formed of parallel elastic diaphragms e e', and which box is filled with some iiuid which expands under the iniiuence of heat. 'l'o the diaphragm e, which is situated above the outlet-passage of the casing, is screwed a valve F, extending .seat itself at a.

down into the outlet-passage and adapted to To the upper diaphragm e is screwed a spindle II, which extends through the perforation in the coverB, and is threaded at its upper end 7L. t

. I is a nutscrewing on the end of the spindle II, and by which the said spindle and the expansible boxE, attachedto it, are adj usted in proper 'operative position,

Ing against the stuffing-box C, as shown in M the drawings.

the said nut rest! (e e away from each other.

' as far as 'tween the bottom of the casing and yphragm e of the box E.

sarino' J remains stationar D 7 7 J is a spring arranged between the top or cover B of thecasingA land the box E, or a -projection from thespindle H, so that it will press the spindle audits connective box down the stop-nut I will permit it to go. G'is a spring of lighter power than the spring J, which is arranged, as shown, bethe dia- K is a pipe leading into the casing at a, and through which steam and condensed water enter the casing, and L is a pipe leading from the outlet-passage in the casing.

The operation of my steam-trap is as follows: The box E having been carefully adjusted in position, steam entering through the pipe K comes in contact with and surrounds the box E, heating its contents and causing it to expand so as .to force the diaphragms The diaphragm e', being held in position by the spindle Il and and the diaphragm e therefore moves down toward the outlet-passage, compressing the spring Gr and forcing the valve L down until it comes in contact with the valve-seat a and closes the outlet-passage. Tater from the condensation of the steam gradually fills the casing A, and as it rises around the box, the said water being colder than the steam, causes the box to contract and the valve F to be withdrawn from its seat, permitting the water to escape.

In its general character and Inode of operation my improved steam-trap is very similar to Inany now in use; but by providing the spring J to hold the expansible box in position I overcome a defect existing in similar traps and after the valve F is seated the further expansion of the box E takes place by an upward movement of the diaphragm e', the said upward movement being' accompanied by the compression of the spring J. The use of this spring and of the stop-nut I in connection with it constitute the novel and improved features of my device. rlhe spring G is useful in insuring the prompt opening of the Valve, as it causes the diaphragm e to move up as rapidly as the iiuid in the box E permits it to do so.

I have described the box E as having an elastic top and bottom e e; but it must be understood that the particular construction,

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said port when the box expands, a spindle H, secured to the opposite side of the box E and extending through a stuflng-box in the casing, a stop, as I, arranged to prevent the box from approaching the outlet-port beyond a determined distance, ing to press the box and a spring J, aet- E toward the outletport, all substantially as and for the purpose specified.

2. A steam-trap having, in combination, a closed casing with inlet and outlet ports, an expansible box E, situated over the outletport, a valve F, secured to the side of box E over the outlet-port and arranged to close said port when the box expands, a spindle I-I, secured to the opposite side ofthe box E and extending through a smiling-box in the easing, a stop, as I, arranged to prevent the box E from approaching the outlet-port beyond a deterniineddistanee, and a spring G, arranged to press the side e oi' box E away from the outlet-port. l

WILLIS E. HALL. Witnesses:

LIsLE SToKEs, Il. F. GRAYBILL. 

